To cite package 'secrdesign' in publications use:

  Efford, M. G. (2026). secrdesign: Sampling Design for Spatially
  Explicit Capture-Recapture. R package version 2.10.1.
  https://CRAN.R-project.org/package=secrdesign

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {secrdesign: Sampling Design for Spatially Explicit Capture-Recapture},
    author = {Murray Efford},
    year = {2026},
    note = {R package version 2.10.1},
    url = {https://CRAN.R-project.org/package=secrdesign},
  }